Day rowney



(No Model.)

T. W. F. ROWNEY.

DENTAL MOUTH TUBE. I No. 342,042. r Patented May 18, 1886.

VVn-N EssEs.

@Qllg.

flwl UNITED STATES PATENT OFFICE.

THOMAS WALTER FABADAY ROWN'EY, F DERBY, COUNTY OF DERBY,

' ENGLAND.

DENTAL OUTH-TUBE.

SPECIFICATION forming part of Letters Patent No. 342,042, dated May 18,1886.

Application filed March 8, 1886. Serial No. 194,389. (No model.)

v ent in this country at the present time) of which the following is aspecification.

My invention relates to improvements in mouth-tubes for saliva-ejectorsin which two tubular arms are employed of the form shown in thedrawings, or of any other form to suit special cases, and also a tongue-depressor, which is attached to one of the tubular arms, so that it isdetachable and reversible, that it maybe placed on either arm, andthereby can be used in the mouth on either the, right or left side, orthe mouth-tube may be used without the tonguedepressor, according torequirements. I attain these objects by the instrument illustrated inthe accompanying drawlii'gs, in which- Figure 2 is a general view of theentire instrument. Fig. 1 is a view drawn from the instrument with itsthree terminals, A, B, and

, E, resting on a table, and showing arrangement of the holes. andposition of the stops 2; b. Fig. 3 shows the tongue-depressor detached,and also the relative positionof its hole with the hole ill-the armsAand B. Fig.

'4 shows the most suitable curve for the arms and position of the stem0. Fig. 5 is a section of the depressor D.

Similar letters refer to similar parts through v out the several views.

The instrument is a tube, 0, with two or more branchesor arms, A B, anda tongnedepreventing rotation from its pressure.

' pressor, D. These may be of metal or glass or other material, such ashard rubber, usually known as vulcanite or ebonite, or they may be acombination of metal and hard rubber or ebonite, but preference is givento metal, which may be gilded or silvered or nickeled, according to thewishes of the operator.

The instrument may be connected with the saliva-ejector by an elastictube,whioh can he slipped over the swelling at theend of the stem at E.in use one arm is placed between the cheek and the lower teeth, theother within the jaw by the side of the tongue,with the depressor l)resting on the tongue, the stop 6 saliva is sucked through the holesa aa in the arms A and B by any arrangement of ejector which may best suitthe operator.

The depressor D can be removed altogether or placed on either arm A or13, according to the side of the" mouth on which the operator may beengaged.

The stem 6 may. be straight or curved.

I am aware that prior to my inventionmouthtubes of one continuous tubeor one arm only have been used; but

What I claim asmy invention, and desire to secure byLettei-s Patent,is-- In combination with the two branches of a saliva-tube, atongue'depressor adjustable on either arm, substantially as set forth,so that it may be used on either side of the month, all as and forthepurposes set forth.

THOMAS WALTER. FARADAY ROWNEY.

